arm64: dts: amlogic: meson-s4-s905y4-khadas-vim1s: enable HYM8563 RTC

The Khadas VIM1S board has an on-board Haoyu Micro HYM8563 Real Time
Clock (RTC) connected to the I2C1 bus.

Enable the I2C1 controller and add the RTC child node to support
hardware clock persistence.

Signed-off-by: Nick Xie <nick@khadas.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patch.msgid.link/20260327093016.722095-3-nick@khadas.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>

Author: numbqq

arch/arm64/boot/dts/amlogic/meson-s4-s905y4-khadas-vim1s.dts

@@ -20,6 +20,8 @@
 		mmc0 = &emmc; /* eMMC */
 		mmc1 = &sd; /* SD card */
 		mmc2 = &sdio; /* SDIO */
+		rtc0 = &rtc;
+		rtc1 = &vrtc;
 		serial0 = &uart_b;
 	};
 
@@ -223,6 +225,19 @@
 	phy-mode = "rmii";
 };
 
+&i2c1 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c1_pins2>;
+	clock-frequency = <100000>;
+
+	rtc: rtc@51 {
+		compatible = "haoyu,hym8563";
+		reg = <0x51>;
+		#clock-cells = <0>;
+	};
+};
+
 &ir {
 	status = "okay";
 	pinctrl-0 = <&remote_pins>;